脱式计算,能简便计算的要简便计算.2.5×(1.5+1.5+1.5+1.5)0.125×32×2579÷37+29×73.
(1)2.5×(1.5+1.5+1.5+1.5)
=2.5×(1.5×4)
=(2.5×4)×1.5
=10×15
=15;
(2)0.125×32×25
=0.125×8×4×25
=(0.125×8)×(4×25)
=1×100
=100;
(3)
÷
+
×
=
×
+
×
=(
+
)×
=1×
=
.
=2.5×(1.5×4)
=(2.5×4)×1.5
=10×15
=15;
(2)0.125×32×25
=0.125×8×4×25
=(0.125×8)×(4×25)
=1×100
=100;
(3)
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